SRR-based notch filter for horn antennas

In this contribution, we extend the recent results obtained by our group concerning the use of metamaterial-inspired inclusions to design self-filtering horn antennas. In particular, we propose a new horn antenna with a notched-band characteristic based on the use of a single split-ring resonator (SRR). From simulated results it can be found that the proposed structure has a notched-band around the resonant frequency of the resonator, while it keeps the characteristics of the standard horn antenna in the rest of the frequency band.